You spot the new sign and your stomach drops—twenty miles per hour lower with little […] ...

Add Yahoo as a preferred source to see more of our stories on Google. An example of what variable speed limit signs look like above a highway in Washington. (Courtesy of the Washington State ...

Across the country, drivers are running into a new kind of speed rule that feels […] ...

Speed limits across Texas roads are about to get smarter. In an effort to make highways safer and more responsive to real-time conditions, state officials are beginning a wider rollout of variable ...